Update packer.io to version 0.6.1
Update documentation for version update
Merge pull request #1 in ISAR/ansible-packerio from ~KUSCH/ansible-packerio:feature/packerio-0.6.1 to next

* commit 'b22b5555a1bf47215b5b9fe069830170fd1b0075':
  Update documentation for version update
  Update packer.io to version 0.6.1
ansible-packerio 0.9.0